Alcohol could be used to relieve stress, that Type A workers could end up in jobs with longer hours, or that there could be an associated link between demanding jobs, alcohol use and people with existing depression or sleep problems.

CEOs who end the day with a few glasses of pricey scotch and minimum-wage workers who throw back a few beers after their second shift are both more likely to over-drink than those who work fewer hours.

Why So Jittery? (Nutritionaction.com; Center for Science in the Public Interest)